After finding runaway success with gold, Costco adds an even more precious metal to its offerings

Costco is going platinum.The wholesale retailer — which has gotten a massive boost from peddling gold bars — announced Wednesday it will sell 1-ounce platinum bars on its website for $1,089.99 each.The company will also sell a 1-ounce Canada maple leaf platinum coin for the same price. 3 Costco announced on Wednesday it is selling 1-ounce platinum bars on its website for$1,089.99 each. CostcoThe bars and coins are available online only and cannot be delivered to Louisiana, Nevada or Puerto Rico, the comp ...